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Street Stock

Qualifying, Ladder, and Tree Information

Vehicle/Body Rules

The body must be stock for the year, make, and model claimed. Aftermarket panels are limited to hood and trunk lid/hatch. No fender well or wheel tub modifications.

OEM dash required. Carpet and interior panels forward of package shelf required. Must have headliner, sun visors, instrument panel, and vents. Radio and HVAC controls may be replaced with delete panel. Two front seats are required and must be securely mounted. Aftermarket seats are allowed. Rear seats may be removed. Windows must be factory style safety glass and operational. Lexan windows are prohibited. All mirrors for body style required.

Engine & Drivetrain Rules

Stock L99, LT1, or LT4 engines only. Engine must be internally stock using stock or stock replacement components. Factory style rebuilds allowed but must retain stock bore and stroke. Internal modifications limited to rocker arms and valve springs. LT4 engines are limited to stock rockers and valve springs. Guide plates allowed if non-self-aligning rocker arms are used. Minimum deck height of .015”. Stock thickness head gaskets required for engine block and heads claimed. OEM hydraulic lifters required. Modified or limited travel lifters are prohibited. All engine internals including, but not limited to, pistons, rods, crank, valves, camshaft, heads, and block must be stock or stock replacement (stock replacement defined as: must be the same size, material, weight, design, and construction as Original Equipment) and correct for the engine claimed. Cylinder heads must retain published stock volumes. Cylinder head modifications are limited to stock valve job. Cylinder head porting and or welding is prohibited. Bolt in solid motor mounts allowed. No motor plates.

Stock intake manifold required. Edelbrock LTx specific intake manifold may be used. Intake may not be modified or ported. The only exception would be modified at the front openings for larger than stock throttle body.

Exhaust system may be replaced with tubular headers and aftermarket exhaust systems. Mufflers are required. Exhaust must exit behind driver seat area. Exhaust cut-outs must remain closed at all times.